[GROOVY-9739] NPE in ClassNode.isDerivedFrom while compiling trait with Groovy 3.0.5

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.5
• Fix Version/s: 4.0.0-alpha-1, 3.0.6, 2.5.15
• Component/s: Compiler
• Environment: Travis CI Ubuntu (also macOS) JDK 9
• Flags: Important
• Assignee: Eric Milles
• Reporter: Sean Gilligan
• Created: 13/Sep/20 06:09
• Updated: 01/Jan/21 17:54
• Resolved: 16/Sep/20 09:46

Description

Compiler crashes in Gradle build with Groovy 3.0.5. Works with Groovy 3.0.4.

Caused by: java.lang.NullPointerException

        at org.codehaus.groovy.ast.ClassNode.isDerivedFrom(ClassNode.java:909)

        at org.codehaus.groovy.ast.tools.WideningCategories.implementsInterfaceOrSubclassOf(WideningCategories.java:733)

        at org.codehaus.groovy.classgen.AsmClassGenerator.visitCastExpression(AsmClassGenerator.java:799)

        at org.codehaus.groovy.ast.expr.CastExpression.visit(CastExpression.java:85)

Fails with both JDK 8 and JDK 9, see Travis CI jobs:

Failure: https://travis-ci.org/github/ConsensusJ/consensusj/jobs/716458220
Success: https://travis-ci.org/github/ConsensusJ/consensusj/builds/726709254